261422451670630 has 32 divisors (see below), whose sum is σ = 470778938784000. Its totient is φ = 104520421132512.

The previous prime is 261422451670609. The next prime is 261422451670643. The reversal of 261422451670630 is 36076154224162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2289126271 + ... + 2289240469.

It is an arithmetic number, because the mean of its divisors is an integer number (14711841837000).

Almost surely, 2^{261422451670630} is an apocalyptic number.

261422451670630 is a deficient number, since it is larger than the sum of its proper divisors (209356487113370).

261422451670630 is a wasteful number, since it uses less digits than its factorization.

261422451670630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218508.

The product of its (nonzero) digits is 2903040, while the sum is 49.

The spelling of 261422451670630 in words is "two hundred sixty-one trillion, four hundred twenty-two billion, four hundred fifty-one million, six hundred seventy thousand, six hundred thirty".